Lamp



FIG. 1 is a front, top perspective view of a lamp, showing the new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front view thereof; wherein the back, left side, and right side views are identical thereto;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines of even length shown in the drawings illustrate portions of the lamp that form no part of the claimed design. 

CLAIM The ornamental design for a lamp, as shown and described. 